Laminated waterproof lining for containers



Dec. 1, 1931.

R. E. PIERCE LAMINATED WATERPROOF LINING FOR CONTAINERS Filed7 April 15,1928 2 Sheets-Sheet l Helleense ,y1/1111111111 C ZNP 22 DCC. 1, 1931. nR, E. MERCE l 1,834,802

LAMINATED WATERPROOF LINING FOR CONTAINERS Filed April l5. 1928 2Sheets-Sheet 2 j] /f/m @6.14

'fc/ 6.11 12- -12 "Z4 TTy.

'-'50 a laminated lining l Patented Dee. '1. 1931 UNITED'. STATES PATENTOFFICE 'ROBERT E. PIERCE, OF ST. LOUIS,

MISSOURI, ASSIGNOR TO BEMLIS BRO. BAG CO., OF S1'. LOUIS, MISSOURI, ACORPORATION OF mssonnr MATE!) WATERPROOF LINING FOB CONTAINERSApplication led April 13,

My invention relates to improvements in laminated water proof liningsfor containers, and has for its primary object a laminated lining forcontainers which is air, sift gandwater proof.

A further object is to construct a lining as aformentioned which isreadily removable from the container so that the container itself can besalvaged;

A still further object is to construct a laminated lining which, inaddition to being air, sift and water proof, can be'readily inserted inand removed from a container, the lining itself not being sticky ortacky so that a number of linings can be stored or individual liningshandled readily and without sticking to each other or sticking to thehands of the person handling the same.

In the drawings: Fig. 1 is a plan view ofa sheet of laminated materialready for folding.k

Fig. 2 is a reverse view of the same with the 3longitudinal edges foldedover. .Fig 3 is a side view of my lining as com- 251-pleted for abag.

Fig. 4 is an enlarged fragmental section taken on the line 4-4 of Fig.3. Fig. 5 is an enlarged fragmental section taken on the line 5 5 ofFig. 2. Fig. 6 is a fragmental view showing a variation in thelaminations.

Fig. 7 is an enlarged view taken on the line 7-7 of Fig.`6. L"

Fig. 8 is a fragmental a` two ply lamination.

Fig. 9 is a similar view of a three ply lamination.

Fig. 10 is a view of a bag illustrating the manner of closing the openend thereof after my container has been inserted. g

Fig. 11 is an enlarged fragmental section taken on the line 11-11 ofFig. 10. Fig. 12 is an enlarged fragmental section taken on the line12-12 of Fig. 11.

Fig. 13 is a view with the container in section showing my lining inposition; and

Fig. 14 is an enlarged sectional view taken on the line 14-14 of Fig.13.

In the construction of my device I employ consisting of several laynatedlining.

perspective view of 1928. Serial No. 269,667. I

ers of flexible material such as paper or the like. Itis preferable thatthis material in itself be air and sift proof. The laminations consistof a sheet of material 15, which has its surface coated with waterproofing material or substance 16. lThis water proofing should beiiexibler` so that it will not crack after setting and is applied whilein a` moist f or plastic condition, and when in the condition as appliedis adhesive. After coating the sheet or lamination 15 with this waterproofing substance a sheet or lamination 17 is placed thereon, the sheetor lamination 17 being narrower than the sheet or lamination 15 so thatthe longitudic5 nal edges of the sheet or lamination 15, which have beencoated with the water proofing substance, will be exposed and still besticky. The sheet or lamination 17, of course, is placed intermediatethe lon 'tudinal edges 70 of the sheet or lamination 15 so that thelongitudinal margins on both sides of the lamination 17 will be equal.After the lamination 17 has been placed in dposition on the lamination15, the longitu inal y'edges of both laminations are folded over asillustrated in Fig. 2. In other words the longitudinal edges of thelaminations 15 are folded over upon the lamination thus leavingnonadhesive zones 18 extending so along the longitudinal edges of thelami- The laminations are then folded upon themselves so as to bring theends 19 and 20 into juxtaposition. Pressure is then exertedv so that themarginal edges of the laminations 15 extending beyond the lamination 17will adhere together by reason of the adhesiveness of the water roofingsubstance. In this way a closed linlng having expansible vertical edgesis formed. This is fully shown in Fig. 4.

In Figs. 6, 7 and 9 I have shown fragmental views of a lining formed of'three laminations in which the lamination 21 is coated on both faces.The lamination 22 is 95 slightly wider than the lamination 21 and thelamination 23 narrower than thelamination 21, the laminations 22 and23co onding to the laminations 15 and 17. The folding to the three plystructure is similar to the folding of the laminated 'structure asdisclosed in Figs; l2 and 5. The lamination 22 is folded over uponitself, and then the manner of folding is the same as that disclosed inFigs. 4 and 5.

With the structure of lining as disclosed in Fig. 6 I obtain, however, adouble water proofing since the intermediate lamination 21 is coatedwith a waterproofing substance on both sides instead of one side asdisclosed in Figs. 1 to 5 inclusive.

I may, if desired, make one of the laminations, especially the coatedlamination, of heavier material as disclosed in Figs. 8 and 9 withoutdeparting from the spirit of my' invention.H In other words, I may use aheavier material for the lamination, which is provided with the waterproofing substance, or a material which has considerable tensilestrength, ,and for the other lamination use a relatively thin materialand of less tensile strength, the primary object be-k ing to construct alining which is air, water and sift proof, and at the same time will notrupture easily. Therefore, if one of the laminations has 'considerabletensile strength, the other laminations need not be so strong, theirmain object being to cover the water proofing substance so that materialplaced in the liner will not adhere `thereto nor will the liner be'tacwhen handled.

It is referable when ma ing a lining for fabric ags or casings that theliner be slightly longer than the bag or casing 24 itself. I also makethe liner ofless width than the bag or casing 24 so that it can bereadily inserted.

My object in .making the liner longer than the bag or casing 24 is thatwhen the container is filled, the upper end of the liner can be foldedover as illustrated in Fi 11 and then the bag or casing 24 sewe, to-

. gether at its open end or it may be tied in any suitable manner. v

closin the liner independentl of lthe y g y bag I obviate allpossibility of rupturing or tearing the liner or stitching through'theliner and'by having the side edges of the liner readily expansible a bagwill be completel filled and all strain on the liner absor ed by thecasing 24 thus preventing rupturing of the liner.

1 A further advantage of my liner is that it does not have to be foldedin any manner to be inserted in a container.. Sewing is not necessary,and consequently my liner is air\ tight, which is not the case wheresewed liners are used; Furthermore my liner is nonadhesive inside andout and, therefore, can be readily handled and inserted into .andremoved fiom containers so that the container yitself can be salvaged,and by foldii'i over the open end as illustrated in' Fig. 11', t elining .is practically hermetically sealed thus making a bag providedwith my liner espe? adhesive as indicated by the' numerals 21a and 2lb.v

Having fully described my invention, what I claim is 1.' The method ofmaking an air and mois-i ture proof lining for containers which consistsin coating one face of a sheet of iiexible material with an adhesivemoisture and air proofing substance, placing` on said sheet a secondsheet of iiexible material of less width than the firstmentioned sheetso that the longitudinal margins of moisture proofing on the firstmentioned sheet remain exposed, folding said exposed margins and aportion of said second mentioned sheet longitudinally and over onto saidrst/mentioned sheet, and, lastly, folding said sheets over uponthemselves by a lateral fold so that saidvexposed margins will besuperimposed upon themselves and adhere together whereby a lining havingexpansible longitudinal edges is formed.

2. A lining for containers, comprising a iexible body made of laminatedsheets, one of said sheets being narrower'than the adjacent sheet sothat thelatter extends therebeyond, and an adhesive waterproof coatingbetween said adjacent sheets and on the extending portion of thelast-mentioned sheet, said body being folded along aline suiiicientlyinwardly of its freeed e to present an uncoated marginal surface tweensaid line of fold and the coated surface, and said body being foldedupon itself with said coated surfaces vin contact, tofthereby provide anexpansible portion for the lining between said coated portions andtheline of longitudinal fold.

3.. A lining for containers, comprising a flexible body made ofsuperimposed sheets, one of which is narrower than the adjacent sheet sothat the latter extends therebeyond at the longitudinal edges, and anadhesive coating between said adjacent sheets and on the extendingsurfaces of the last-mentioned sheet, said body being inturned alonglines suiiiciently inwardly of its free edges to resent an uncoatedsurface along the fo ded margins of the bod thus folded, and saidbody-being also fol ed upon itself interme.

diate its length with said exposed coated surportions and thelongitudinal lines of fold. v 4. lining for containers, comprising aplurality of sheets .of iexible material of equal length but ofdifferent widths, a wa- 13( te roof iexible adhesive substance betweenad] acent sheets, said linin being folded upon itself to brin its endssustantially together and having t e inner portion of at least one ofits edges secured together with said adhesive substance, and the outermarginal por-- tions unsecured so that saidV marginal portions mayexpand under stress without rupturing the lining. Y

I have axed my In testimony whereof signature.

ROBERT E. PIERCE.

